mMaxTitles = $wgMaxSquidPurgeTitles; } else { $this->mMaxTitles = $maxTitles; } if ( count( $urlArr ) > $this->mMaxTitles ) { $urlArr = array_slice( $urlArr, 0, $this->mMaxTitles ); } $this->urlArr = $urlArr; } static function newFromLinksTo( &$title ) { $fname = 'SquidUpdate::newFromLinksTo'; wfProfileIn( $fname ); # Get a list of URLs linking to this page $dbr = wfGetDB( DB_SLAVE ); $res = $dbr->select( array( 'links', 'page' ), array( 'page_namespace', 'page_title' ), array( 'pl_namespace' => $title->getNamespace(), 'pl_title' => $title->getDBkey(), 'pl_from=page_id' ), $fname ); $blurlArr = $title->getSquidURLs(); if ( $dbr->numRows( $res ) <= $this->mMaxTitles ) { while ( $BL = $dbr->fetchObject ( $res ) ) { $tobj = Title::makeTitle( $BL->page_namespace, $BL->page_title ) ; $blurlArr[] = $tobj->getInternalURL(); } } $dbr->freeResult ( $res ) ; wfProfileOut( $fname ); return new SquidUpdate( $blurlArr ); } /** * Create a SquidUpdate from an array of Title objects, or a TitleArray object */ static function newFromTitles( $titles, $urlArr = array() ) { global $wgMaxSquidPurgeTitles; $i = 0; foreach ( $titles as $title ) { $urlArr[] = $title->getInternalURL(); if ( $i++ > $wgMaxSquidPurgeTitles ) { break; } } return new SquidUpdate( $urlArr ); } static function newSimplePurge( &$title ) { $urlArr = $title->getSquidURLs(); return new SquidUpdate( $urlArr ); } function doUpdate() { SquidUpdate::purge( $this->urlArr ); } /* Purges a list of Squids defined in $wgSquidServers. $urlArr should contain the full URLs to purge as values (example: $urlArr[] = 'http://my.host/something') XXX report broken Squids per mail or log */ static function purge( $urlArr ) { global $wgSquidServers, $wgHTCPMulticastAddress, $wgHTCPPort; /*if ( (@$wgSquidServers[0]) == 'echo' ) { echo implode("
\n", $urlArr) . "
\n"; return; }*/ if( empty( $urlArr ) ) { return; } if ( $wgHTCPMulticastAddress && $wgHTCPPort ) { return SquidUpdate::HTCPPurge( $urlArr ); } $fname = 'SquidUpdate::purge'; wfProfileIn( $fname ); $maxsocketspersquid = 8; // socket cap per Squid $urlspersocket = 400; // 400 seems to be a good tradeoff, opening a socket takes a while $firsturl = SquidUpdate::expand( $urlArr[0] ); unset($urlArr[0]); $urlArr = array_values($urlArr); $sockspersq = max(ceil(count($urlArr) / $urlspersocket ),1); if ($sockspersq == 1) { /* the most common case */ $urlspersocket = count($urlArr); } else if ($sockspersq > $maxsocketspersquid ) { $urlspersocket = ceil(count($urlArr) / $maxsocketspersquid); $sockspersq = $maxsocketspersquid; } $totalsockets = count($wgSquidServers) * $sockspersq; $sockets = Array(); /* this sets up the sockets and tests the first socket for each server. */ for ($ss=0;$ss < count($wgSquidServers);$ss++) { $failed = false; $so = 0; while ($so < $sockspersq && !$failed) { if ($so == 0) { /* first socket for this server, do the tests */ @list($server, $port) = explode(':', $wgSquidServers[$ss]); if(!isset($port)) $port = 80; #$this->debug("Opening socket to $server:$port"); $error = $errstr = false; $socket = @fsockopen($server, $port, $error, $errstr, 3); #$this->debug("\n"); if (!$socket) { $failed = true; $totalsockets -= $sockspersq; } else { $msg = 'PURGE ' . $firsturl . " HTTP/1.0\r\n". "Connection: Keep-Alive\r\n\r\n"; #$this->debug($msg); @fputs($socket,$msg); #$this->debug("..."); $res = @fread($socket,512); #$this->debug("\n"); /* Squid only returns http headers with 200 or 404 status, if there's more returned something's wrong */ if (strlen($res) > 250) { fclose($socket); $failed = true; $totalsockets -= $sockspersq; } else { @stream_set_blocking($socket,false); $sockets[] = $socket; } } } else { /* open the remaining sockets for this server */ list($server, $port) = explode(':', $wgSquidServers[$ss]); if(!isset($port)) $port = 80; $socket = @fsockopen($server, $port, $error, $errstr, 2); @stream_set_blocking($socket,false); $sockets[] = $socket; } $so++; } } if ($urlspersocket > 0) { /* now do the heavy lifting. The fread() relies on Squid returning only the headers */ for ($r=0;$r < $urlspersocket;$r++) { for ($s=0;$s < $totalsockets;$s++) { if($r != 0) { $res = ''; $esc = 0; while (strlen($res) < 100 && $esc < 200 ) { $res .= @fread($sockets[$s],512); $esc++; usleep(20); } } $urindex = $r + $urlspersocket * ($s - $sockspersq * floor($s / $sockspersq)); $url = SquidUpdate::expand( $urlArr[$urindex] ); $msg = 'PURGE ' . $url . " HTTP/1.0\r\n". "Connection: Keep-Alive\r\n\r\n"; #$this->debug($msg); @fputs($sockets[$s],$msg); #$this->debug("\n"); } } } #$this->debug("Reading response..."); foreach ($sockets as $socket) { $res = ''; $esc = 0; while (strlen($res) < 100 && $esc < 200 ) { $res .= @fread($socket,1024); $esc++; usleep(20); } @fclose($socket); } #$this->debug("\n"); wfProfileOut( $fname ); } static function HTCPPurge( $urlArr ) { global $wgHTCPMulticastAddress, $wgHTCPMulticastTTL, $wgHTCPPort; $fname = 'SquidUpdate::HTCPPurge'; wfProfileIn( $fname ); $htcpOpCLR = 4; // HTCP CLR // FIXME PHP doesn't support these socket constants (include/linux/in.h) if( !defined( "IPPROTO_IP" ) ) { define( "IPPROTO_IP", 0 ); define( "IP_MULTICAST_LOOP", 34 ); define( "IP_MULTICAST_TTL", 33 ); } // pfsockopen doesn't work because we need set_sock_opt $conn = socket_create( AF_INET, SOCK_DGRAM, SOL_UDP ); if ( $conn ) { // Set socket options socket_set_option( $conn, IPPROTO_IP, IP_MULTICAST_LOOP, 0 ); if ( $wgHTCPMulticastTTL != 1 ) socket_set_option( $conn, IPPROTO_IP, IP_MULTICAST_TTL, $wgHTCPMulticastTTL ); foreach ( $urlArr as $url ) { if( !is_string( $url ) ) { throw new MWException( 'Bad purge URL' ); } $url = SquidUpdate::expand( $url ); // Construct a minimal HTCP request diagram // as per RFC 2756 // Opcode 'CLR', no response desired, no auth $htcpTransID = rand(); $htcpSpecifier = pack( 'na4na*na8n', 4, 'HEAD', strlen( $url ), $url, 8, 'HTTP/1.0', 0 ); $htcpDataLen = 8 + 2 + strlen( $htcpSpecifier ); $htcpLen = 4 + $htcpDataLen + 2; // Note! Squid gets the bit order of the first // word wrong, wrt the RFC. Apparently no other // implementation exists, so adapt to Squid $htcpPacket = pack( 'nxxnCxNxxa*n', $htcpLen, $htcpDataLen, $htcpOpCLR, $htcpTransID, $htcpSpecifier, 2); // Send out wfDebug( "Purging URL $url via HTCP\n" ); socket_sendto( $conn, $htcpPacket, $htcpLen, 0, $wgHTCPMulticastAddress, $wgHTCPPort ); } } else { $errstr = socket_strerror( socket_last_error() ); wfDebug( "SquidUpdate::HTCPPurge(): Error opening UDP socket: $errstr\n" ); } wfProfileOut( $fname ); } function debug( $text ) { global $wgDebugSquid; if ( $wgDebugSquid ) { wfDebug( $text ); } } /** * Expand local URLs to fully-qualified URLs using the internal protocol * and host defined in $wgInternalServer. Input that's already fully- * qualified will be passed through unchanged. * * This is used to generate purge URLs that may be either local to the * main wiki or include a non-native host, such as images hosted on a * second internal server. * * Client functions should not need to call this. * * @return string */ static function expand( $url ) { global $wgInternalServer; if( $url != '' && $url{0} == '/' ) { return $wgInternalServer . $url; } return $url; } }